The whole world knows what beauty is like, because of evil and ugliness being around; Can all feel what kindness is like, because of unkindness and cruelty existing. When grow, have or not have, results, When try to accomplish, hard or easy, appears, When shape things up, longer or shorter, shows, When stand beside one another, high or low, merges, When harmonize music, tones and voices, are mixing, When follow one another, front or back, becomes, ... ... eternally.
Therefore,Saints,
Doing things without needing to act, Teach lessons without needing to speak; All things, after being done, go right back to the beginning, Without owning after creating, Without possessing after doing, Succeeding without holding on.
Only because of not holding on, it'll be living/lasting forever.